Pressure-flushing system for a toilet bowl

ABSTRACT

The invention relates to a pressure-flushing system ( 100 ) for toilet bowls, comprising a cistern mounting ( 500 ) and a drain module ( 200 ), said drain module ( 200 ) comprising a vertically oriented pressurized water tank ( 501 ) and a drain pipe ( 502 ), a hydraulic drain valve ( 18 ) and a DC pipe interrupter ( 5 ). The drain pipe ( 502 ) is mounted vertically in the pressurized water tank ( 501 ) and projects from the bottom of the pressurized water tank ( 201 ) for a flow connection with the toilet bowl. The drain module ( 200 ) is retained by the cistern mounting ( 500 ), which also carries a gas accumulator ( 19 ). The cistern mounting ( 500 ) has a water-carrying design and has a water connection ( 8 ) for connection to a drinking water mains or similar, and connecting channels ( 507, 510 ) that fluidically connect the pressurized water tank ( 501 ) and the gas accumulator. The pressure-flushing system ( 100 ) complies with standard EN 1717, is compact and easy to install. It allows pressure-wave flushing with little water and low noise emission.

FIELD OF THE INVENTION

The invention belongs to the field of sanitary technology and hygienedevices. It relates to a pressure flushing system for a toilet bowl andin particular to a constructive solution for a cistern mounting of thetoilet pressure flushing system and to a constructive solution for anoutflow module of this pressure flushing system, wherein the pressureflushing system flushes using a pressurized water wave referred to as ashockwave. The pressure flushing system is designed so that the flushingtakes place with little noise development and low water consumption,wherein the avoidance of contamination of the drinking water by backflowin the event of malfunctions in the water supply system is ensured. Inthe documents of this application, the term “pressure flushingcontainer” for toilet flushes is to be understood in the meaning of asanitary fitting for toilet bowls.

BACKGROUND OF THE INVENTION

Pressure flushing devices are typically known in the sanitary field fromthe prior art, in which a self-closing pressure flushing valve having acomplex structure and low flow rate is connected directly to thedistribution system of the pressurized water supply or the drinkingwater line. Therefore, these pressure flushing devices are typicallyprovided having the ¼″ fitting for pressurized water lines and typicallyonly on flushing urinals. These pressure flushing devices are notsuitable for toilet bowls, because they are not capable without a watercollection pressure device of dispensing a sufficient water quantitywithin a short time.

Pressure flushing devices having pressurized water accumulators havebeen developed for flushing toilet bowls, which can dispense a specificwater quantity in a specific time. A pressure flushing device isdescribed in the prior art in the U.S. Pat. No. 6,470,505 B1, in whichthe flushing water flows with the aid of a flexible membrane by means ofcompressed air from a pressurized container via a connecting line and avalve into a toilet bowl. This system offers 2 L of water in threeseconds, from which it is apparent that the initial water wave or thewater front at the beginning of the water wave only flows out softly anddoes not have sufficient speed so that it is not sufficiently strong toreliably flush the toilet bowl.

Furthermore, a pressure flushing device is also described in FR 2 552135, in which the flushing water also moves with the aid of compressedair from a pressurized container via a connecting line and a valve up tothe toilet bowl. This system comprises a pressurized container having acapacity of 10 L, a rather thin flexible connecting line having a valvewith inadequate water flow rate.

One significant disadvantage of pressure flushing devices as they aredescribed in the published American and French documents is the factthat after the valve the speed of the initial water outflow is notsufficiently rapid, i.e., the initial water front of the water outflowis not steep enough to ensure the reliability in the case of a singleflush.

From a design aspect, pressure flushing devices from the prior art arecharacterized by:

-   -   complex installation, because they consist of many structural        parts, which have to be connected gradually using pipe and hose        systems up to the installation location, whereby reliable        installation cannot be ensured in the long term;    -   complex service for the many fittings;    -   risk of contaminating the drinking water in the water supply        system due to backflow in the event of malfunctions;    -   being bulky, because a comparatively large space has to be        built-up.

The above-mentioned disadvantages are remedied by the invention. Usingcorresponding technical means, in a manner adapted to the respectivegiven circumstances, design and service are simplified, noise and waterconsumption are minimized, the reliability of the flushing and designare improved, and contamination of the drinking water in water supplylines by backflow in the event of malfunctions is avoided, and also thebuilt-up space for the pressure flushing device of the toilet facilityis reduced.

The result of this invention is a toilet pressure flushing systemcomprising a cistern mounting and an outflow module for such a pressureflushing system, which provides a shockwave for flushing with low noiseintensity and low water consumption at the same time. According to theinvention, this pressure flushing system can be applied in or oncorresponding toilet bowls.

SUMMARY OF THE INVENTION

According to the invention presented here, the above-mentioneddisadvantages are remedied by the special design of the toilet pressureflushing system, in particular by the special design of the cisternmounting for a toilet pressure flushing system and by the special designof the outflow module for a toilet pressure flushing system, using atleast one hydraulic gas accumulator and a pressurized water container.In this case, after the opening of a hydraulic outflow valve, the energyof a pressurized gas, in particular compressed air, in the hydraulic gasaccumulator is used, which ensures a rapid pressurized outflow of thewater “as a shockwave” from the pressurized water container into thetoilet bowl having steep water front at the beginning of the water wave.All standing and hanging toilet bowls or toilet bowls mounted in anotherform are considered toilet bowls in the meaning of this invention.

The cistern mounting is designed so that it accommodates the pressurizedwater container and the gas accumulator or accumulators and fixedlyconnects them to one another. Moreover, it has installation elements,which are used for installation in a manner adapted to the respectivesurroundings, for example, in the region of the toilet bowl itself or onthe wall behind the toilet bowl or also in the wall, in in-wallsituations around the toilet bowl. A compact construction of thepressure flushing system and easy installation with few actions ispossible using the mentioned cistern mounting. The cistern mounting isadditionally designed as water-conducting comprising channels for theinflow and outflow of the flushing water and comprising connectingchannels between the gas accumulator or accumulators and the pressurizedwater container, which further simplifies the installation of the toiletpressure flushing system and enables a very compact and verylow-maintenance installation.

The outflow module comprises a pressurized water container, an outflowpipe in the pressurized water container, and a connection provided witha hydraulic outflow valve between pressurized water container andoutflow pipe, via which a regulated flushing procedure is ensured.Furthermore, a pipe interrupter of structural form A1 type DC (referredto as DC air filter or DC filter for short) is integrated, whichreliably prevents the backflow of dirty water according to norm EN 1717in the event of malfunctions in the pressurized water supply system orthe drinking water line. Due to the integration of the outflow pipe intothe pressurized water container, the noise development during theflushing procedure is damped by the surrounding pressurized watercontainer having the water contained therein, so that in relation totypical pressure flushing devices, the noise intensity of the toiletpressure flushing system according to the invention is significantlyreduced.

According to the invention, the cistern mounting of the toilet pressureflushing system comprises a carrier plate having an open outflow shellaccessible from above, which is manufactured for the connection of anoutflow module and has an outflow opening for placement of an outflowpipe in its base center. The carrier plate has at least one open inflowshell accessible from above, wherein each inflow shell is used forconnecting a hydraulic gas accumulator and has an inlet/outlet openingon a peripheral section of the base, which is used both for the waterinflow and also the water outflow into or out of, respectively, thehydraulic gas accumulator. The inlet/outlet opening is connected to aninflow channel, which has a water connection for the connection to apressurized water supply line or drinking water supply line. Theinlet/outlet opening of the open inflow shell is connected via aconnecting channel or connecting pipe to an opening on the peripheralsection of the base of the open outflow shell. The open outflow shellhas attachment flanges for connecting the outflow module. The attachmentof the outflow module to the outflow shell can be carried out with theaid of advantageous attachment technologies, wherein it is necessary forthe connection to be pressure-tight. The open inflow shell(s) alsohas/have attachment flanges for the attachment of the hydraulic gasaccumulator or accumulators.

The attachment of a hydraulic gas accumulator to the inflow shell canalso be performed using advantageous attachment technologies, wherein itis necessary for the connection to be pressure-tight. The outflowopening in the base center of the outflow shell has a pressure seal forattaching an outflow pipe. In some embodiments, the outflow pipe is NOTa component of the cistern mounting. In other embodiments the outletpipe IS a component of the cistern mounting. The cistern mounting can beused in conjunction with a toilet flushing system which can be based onthe technology of pressure flushing. The proposed cistern mounting isalso usable in conjunction with unpressurized flushing systems. Thecarrier plate is embodied variably with respect to respective solutions.It has, for example, thin walls having stabilizing ribs, for example,made of ribbed cast plastic. It is thus possible that the base of theoutflow shell and/or the inflow shell protrudes out on the lower side ofthe carrier plate, for example, in the form of a spherical cap or a deepcylinder. For practical reasons, installation retention elements arelocated on the carrier plate.

In a special embodiment of the cistern mounting, for the purpose ofoptimum usage of the installation space which is provided for a cisternof a toilet pressure flushing device, two accessible open inflowshells—a right and a left—are provided on the top of the carrier platefor the connection of one hydraulic gas accumulator in each case,wherein each of the inflow shells is connected to an inflow channel orto an inflow pipe having water connection. The inlet/outlet openings ofthe open inflow shell are connected via connecting channels orconnecting pipes to supply openings at the base edge or on theperipheral section of the base of the open outflow shell. The outflowshell is located between the left and the right inflow shells.

The toilet pressure flushing system for toilet bowls using flushingshockwave is completed by two hydraulic gas accumulators having apredetermined water volume and compressed air volume, wherein thecompressed air volume is filled using air or another favorable gas. Thetwo hydraulic gas accumulators are provided via the cistern mountingwith at least one water connection. The cistern mounting thus originallyfulfills the function of a hydraulic connection for the water inflow outof the drinking water system into the hydraulic gas accumulators and forthe water outflow into the toilet bowl via the outflow module.

The proposed cistern mountings can be used in conjunction with theoutflow module and the hydraulic gas accumulators as a toilet pressureflushing system having pressure wave flushing at the consumer in toiletpressure flushing devices and can be mounted using two simple actions.The first action is the installation of the compact pressure flushingsystem having one end of the outflow pipe at the flushing opening in theceramic toilet bowl. The second action is then the connection of theinflow channel of the cistern mounting to the pressurized water ordrinking water system, in the standard construction embodiment having apressure of approximately 0.15 to 0.5 MPa or also other pressures. Ifnecessary, the water flow rate can also be optimally set.

The advantages of a cistern mounting for toilet pressure flushingdevices having pressure wave flushing using an outflow module andhydraulic gas accumulators (referred to together as a pressure flushingsystem for toilet bowls or as a toilet pressure flushing system forshort) are visibly effective according to the developed invention, whichcan also be noted from the outside. One essential advantage is the factthat the cistern mounting is universally usable for toilet pressureflushing devices having pressure wave flushing. It has a simple completeconstruction, whereby it can be installed easily and rapidly, operatesreliably, and simplifies the maintenance, which enables its usage incorresponding pressure flushing devices having different types of toiletbowls of different manufacturers. A further essential advantage is thefact that thanks to the cistern mounting, on which the two mostimportant components (outflow module and hydraulic gas accumulator(s))are fastened, it is possible to fit the entire toilet pressure flushingsystem into the ceramic toilet bowl or into prepared existing ceramicwater containers which are located in the region of the toilet bowl.

An advantage of the pressure flushing system as a whole is the specialquality of the pressure wave flushing generated by this toilet pressureflushing system and the low noise development.

According to the invention, the outflow module of the toilet pressureflushing system having pressure wave flushing and low noise intensitycomprises a vertically oriented pressurized water container, which iscontinuously flooded and in which a vertically arranged outflow pipe islocated, which extends at its lower end beyond an opening at the base ofthe pressurized water container and discharges into the toilet bowl. Thepressurized water container has a slightly conical or cylindrical shapeor another shape favorable with respect to pressure resistance. The axisof the outflow pipe is advantageously concentric with the axis of thepressurized water container but does not have to be.

The upper end of the outflow pipe is connected to a lower part of a pipeinterrupter A1-DC (DC air filter or DC filter for short), for example,by means of an inserted connection and ring seals. The lower part of theDC air filter ends in an outlet connecting piece. An upper part of theDC air filter is connected to an upper part of the pressurized watercontainer, for example, by means of a threaded connection or an adhesivebond. The upper part of the DC air filter is terminated using a flushingwater regulator and/or control elements for opening and/or closing ahydraulic outflow valve.

The control elements of the hydraulic outflow valve for the openingand/or closing thereof can be located at various other points, which isdependent on the type of the hydraulic outflow valve used. They can beembodied according to a mechanical or electromechanical pressure, step,or hand lever principle with possible brake or with installed electronictime lock.

The flushing water regulator is connected to the upper part of the DCair filter by means of a threaded connection and restricts the raisingof a valve core of the hydraulic outflow valve. By screwing the flushingwater regulator further into or down into the upper part of the DC airfilter, it is possible to adapt and optimize the total volume of thewater flow rate of the hydraulic outflow valve, which is used forflushing the toilet bowl. The steepness of the water front of theshockwave for flushing toilet bowls can thus also be adapted to thedesign of the toilet bowls of various manufacturers and the shape ofvarious toilet bowls can thus be taken into consideration.

Horizontal outflow channels, which connect the inner water volume in thepressurized water container to a space above the seat of the hydraulicoutflow valve, which is located in a valve chamber of the hydraulicoutflow valve, are located in the middle part of the DC air filter. Thevalve core is located in the valve chamber. A seat for the valve core ofthe hydraulic outflow valve is connected to the lower side of the DC airfilter using a threaded connection. The middle part of the DC air filterhas vertical connecting ribs, which connect the lower and upper parts ofthe DC air filter. Usually, these are four connecting ribs, but thenumber thereof is variable.

Vertical ventilation channels—usually four—are embodied extending overthe upper part of the DC air filter, the connecting ribs, and the lowerpart of the DC air filter.

The pressurized water container of the outflow module is a designelement for water volumes with continuous flooding after the completedinstallation. For the installation, the pressurized water container isconnected via connecting flanges of the outflow shell of the cisternmounting to the cistern mounting and the outflow pipe is guided outwardvia the opening at the base of the pressurized water container. Thepressurized water container is then closed using the upper part of theDC air filter. The toilet pressure flushing system using pressure waveflushing is completed by a hydraulic gas accumulator having apredetermined water volume and gas or compressed air volumes, which isalso located on the cistern mounting, which has at least one waterconnection. The use of two or more hydraulic gas accumulators is alsoexpected.

The cistern thus originally fulfills the function of a hydraulicconnection for the water supply from the water system into the hydraulicgas accumulators and the water outflow from the outflow module into thetoilet bowl.

The material for producing a pressurized water container of the outflowmodule is, for example, polypropylene or a composite material based onpolymer or the like. It can also be produced as a metal pressurizedcontainer or ceramic vessel comprising a plastic and/or metalreinforcement or carbon fiber reinforcement. The pressurized watercontainer and/or even the outflow module itself can be embodied as acartridge, which also corresponds to the essence of the pressurizedwater container with respect to the required shapes, properties, anduses. The cartridge solution also offers the option of simple exchangeor replacement in the event of malfunctions, and also various ways ofinstallation and actions, etc. The water volume can be 0.2 to 2 L oreven more if necessary.

There is also great variability in the use of the outflow module as acomponent of a pressure flushing devices for toilets using a pressurewave flushing, which can be integrated into the ceramic body of thetoilet bowl or can be installed in any other toilet, for example, inceramic covers or covers made of corresponding usage material of thetoilet, as a toilet bowl, or as a rear part of the toilet bowl or on/inthe wall in the vicinity of a toilet bowl.

The protection of drinking water from contamination by backflow in theevent of malfunctions, for example, in the event of partial vacuum inthe drinking water line, is prescribed in EU norm EN 1717. It is alsoprescribed therein that for this purpose a DC filter can be provided asa safety device. The term DC filter is also known under the term “pipeinterrupter having continuous atmospheric venting” or “pipe interrupterof structural form A1/type DC” or “DC pipe interrupter” in short. EN1717 furthermore prescribes that a barrier cannot be provided in theflow direction after the DC filter, and the lower edge of the ventingopening of the DC filter or its outlet connecting piece also has to belocated at a minimum safety height of 0.150 m to 0.400 m above the flowlevel, depending on the corresponding norms in the individual countriesand in consideration of the categorization of the pressurized watertoilet flushing. Outlet-side lines of the toilet are to be produced sothat backup of the wastewater cannot take place.

In the invention presented here, the protection of the drinking waterfrom contamination due to backflow is ensured in the event ofmalfunctions, for example, in the event of partial vacuum in thedrinking water line. For this purpose, a hydraulic outlet valve isimplemented in the DC filter while maintaining the above-mentionedcondition.

The invention does not preclude the option of using further hydraulicelements. In this case, for example, one of the following elements canbe integrated into the pressurized water supply line: inlet shutoffvalve, pressure reducer, backflow valve, reduction valve.

The advantages of an outflow module with simultaneous use of hydraulicgas accumulators according to the developed invention in a pressureflushing system for a toilet bowl are apparent from the effects whichare recognizable solely externally: pressure wave flushing and low noiseintensity during flushing. One essential advantage is the fact that theoutflow module is universally usable in toilet pressure flushingdevices; i.e., also advantageously in pressure flushing devices forvarious toilet bowl types of various producers. It is a simple, completedesign which enables simple, rapid, and reliable mounting and simplifiesthe service. The service work relates in principle to the removal of theflushing water regulator, whereby the entire valve chamber becomesaccessible. The outflow pipe is also accessible due to the removal ofthe DC filter. A very essential advantage of the outflow module fortoilet bowl pressure flushers using pressure wave flushing employinghydraulic gas accumulators according to this invention is the fact thatthe pressure flushing noises are substantially eliminated due toattachment of the outflow valve and the outflow pipe in the pressurizedwater container, since these function like a noise damper. This is asubstantial advantage in relation to pressure flushers which are knownfrom the prior art.

One essential advantage of the pressure flushing system having cisternmounting and outflow module is the fact that it is possible to fit theentire pressure flushing system, which enables the pressure waveflushing with low noise development, into a ceramic toilet bowl or intoexisting ceramic water containers which are located at the toilet bowl.

The principles of embodiments EN 14453 and EN 12541, which relate toavoidance measures against backup and for testing using partial vacuum,in conjunction with norm EN 1717, which relates to the protection of thedrinking water in the pressurized water supply line from contaminants,are maintained by the invention, so that aspirating of the flushingwater (water class 5) into the hydraulic inflow of the pressure flushingsystem of an individual cistern does not occur in the event ofmalfunctions (for example, upon the occurrence of a partial vacuum inthe pressurized water supply line or in the event of backup of theflushing water above the water level of the toilet bowl).

The subject matter of the invention also meets the ecological criteriafor issuing the environmental badge of EU number C (2013) 7317 for watertoilets, for which it is defined that the required flushing action andcleanliness of the toilet bowl is achieved using a water quantity of 4L.

BRIEF DESCRIPTION OF THE DRAWINGS

The design according to the invention of the pressure flushing systemfor toilet facilities having cistern mounting and outflow module, whichenables a pressure wave flushing with lower noise intensity, isillustrated by way of example with reference to the appended drawings.The figures are only sketches and are not to scale. Identical elementsare identified with identical reference signs in the figures.

FIG. 1 shows a perspective view from above of a cistern mounting.

FIG. 2 shows a perspective view from above of the cistern mountinghaving parts of an outflow module installed therein in a frame supportdesign;

FIG. 3 shows the cistern mounting having parts installed therein of anoutflow module in a frame support design in a perspective view frombelow;

FIG. 4 shows a side view of a pressure flushing system having cisternmounting, pressurized water container, gas accumulators, and outflowmodule, which is located in the wall frame for the toilet bowl fitting.

FIG. 5 shows a top view of the pressure flushing system in the wallframe from FIG. 4.

FIG. 6 shows an outflow module together with two hydraulic gasaccumulators as part of the pressure flushing system.

FIG. 7 shows the outflow module from FIG. 6 in cross section from theside.

FIG. 8 shows a side view of a DC air filter of the outflow module.

FIG. 9 shows the DC air filter from FIG. 8 in a perspective view fromabove.

FIG. 10 shows the DC air filter from FIG. 8 with its verticalventilation channels in a lateral cross section.

FIG. 11 shows the DC air filter from FIG. 10 in a second lateral crosssection slightly pivoted from that of FIG. 10, so that its horizontaloutflow channels are visible.

FIG. 12 shows the connection of the upper part of the pressurized watercontainer to the DC air filter and outflow valve seated therein in theclosed position in section.

FIG. 13 shows the connection of the upper part of the pressurized watercontainer to the DC air filter having the outflow valve seated thereinin the open position in section.

ILLUSTRATIVE EMBODIMENTS

It is obvious that individual embodiments of the invention are to beillustrative and are not restrictive for technical solutions. A personskilled in the art will be able to find or establish many equivalents tothe specific embodiments of the invention using no more than routineexperiments. Such equivalents also fall under the patent claims.

A specific embodiment of a cistern mounting 500 for a toilet waterpressure flushing system 100 according to the invention using pressurewave flushing is shown in the example illustrated in FIGS. 1 to 3. Thecistern mounting 500 for the toilet water pressure flushing systemcomprises a carrier plate 501 having a centrally arranged open outflowshell 502 accessible from above for accommodating an outflow module 200(see FIG. 4), wherein the outflow shell 502 has an outflow opening 504for the mounting of an outflow pipe 202 in its base 503 (FIG. 2). Thecarrier plate 501 furthermore has two open inflow shells 505 accessiblefrom above, which are each used to accommodate one hydraulic gasaccumulator 19 (see FIG. 4). Each inflow shell 505 has, in a peripheralsection of its base 503′, an associated inlet/outlet opening 506, whichis connected to an inflow channel 507, which has a water connection 508.The inlet/outlet openings 506 of the open inflow shell 505 are eachconnected via a connecting channel 510 (see FIG. 3) to a supply opening509 in the peripheral section of the base 503 of the open outflow shell502. The open outflow shell 502 has an attachment flange 511 for theattachment of the outflow module 200. The open inflow shell 505 also hasattachment flanges 511′ for the attachment of the hydraulic gasaccumulators 19. The outflow opening 504 in the base center 503 of theoutflow shell 502 has an overpressure seal 512 (see FIG. 2) forattaching the outflow pipe 202. In this case, the outflow pipe 202 isnot a component of the cistern mounting 500. In alternative embodiments,the outflow pipe 202 is a component of the cistern mounting 500.

The carrier plate 501 is formed thin-walled having stabilizing ribs 513,preferably made of plastic. The base 503 of the outflow shell 502 andthe base 503′ of the inflow shell 505 protrude at the lower side of thecarrier plate 501 in the form of a spherical cap or a deep cylinder outof the carrier plate 501 (FIG. 3). One water connection 508 is locatedon each of the left side and also the right side on the carrier plate501. However, it is sufficient if only one water connection 508 is usedfor the connection on/to a local pressurized water/drinking water line.For practical reasons, installation retention elements (not shown) arelocated on the carrier plate 501.

A specific embodiment of the pressure flushing system 100 according tothe invention for toilet bowls using pressure wave flushing isillustrated by way of example in FIGS. 4 and 5. A cistern mounting 500having carrier plate 501 and hydraulic gas accumulators 19 installedthereon, and also a pressurized water container 1 installed thereon,which is associated in this example with an easily installable outflowmodule 200, are shown. The outflow module 200 is attached to the outflowshell 502, which is open on top, of the carrier plate 501. The outflowmodule 200 comprises a pressurized water container 201, which iscontinuously filled with water in the usage state, an outflow pipe 202,a DC filter 205, and a hydraulic outlet valve 18. In addition, ahydraulic gas accumulator 19 is installed on each of the left and rightinflow shells 505 and is attached with an included water volume andcompressed air volume on the carrier plate 501 of the cistern mounting500.

FIG. 4 shows the position of the pressure flushing system 100 as acomponent of a pressure flushing device, which is arranged by means of asupporting construction, for example, in the wall behind the toiletbowl. The pressure flushing system 100 is fastened in a frame 90 of thesupporting construction, so that a safety minimum height of 0.400 mmfrom the end of the jet above the overflow level of the toilet bowl ismaintained in relation to the toilet bowl.

The functionality and the achieved action of the cistern mounting 500according to the invention of the pressure flushing system 100 usingpressure wave flushing can be explained as follows: The hydraulic gasaccumulators 19 are filled with water, for example, from the drinkingwater line via the water connection or fittings 508 and via the supplychannel or channels 507. The water required for flushing passes via theconnecting channels 510 in the carrier plate 501 of the cistern mounting500, on the one hand, via the hydraulic gas accumulators 19 into thepressurized water container 1, on the other hand, at least during theinitial filling also directly via the inflow channels 507 and theconnecting channels 510 into the pressurized water container 1.

A specific embodiment of the outflow module 200 according to theinvention having pressure wave flushing and low noise development fortoilet pressure flushing systems 100 is illustrated by way of example onthe basis of FIGS. 6 and 7. The outflow module 200 for pressure flushingsystems 100 for toilet bowls comprises a vertically oriented pressurizedwater container 201, which is continuously filled with water 420 in theusage state. A vertically arranged outflow pipe 202 is located in thepressurized water container 201. The outflow pipe 202 extends with itslower end 240 beyond the base 80 of the pressurized water container 201and the base 503 of the outflow shell 502 into the outlet opening 504 ofthe cistern mounting 500 and either discharges itself via a toilet bowlfitting 20 into a toilet bowl 300 (FIG. 7), or discharges into aconnecting pipe having toilet bowl fitting 20 (FIG. 7). The pressurizedwater container 201 has a shape tapering upward slightly conically inthis example, but can also be formed cylindrical, conically tapering inan inverted manner, or in a shape suitable in another manner forpressurized water. The axis 244 of the outflow pipe 202 is arrangedconcentrically with the axis 82 of the pressurized water container 201in this example, but non-concentric arrangements are also conceivable.

Furthermore, the DC filter 5 and the hydraulic outflow valve 18 in thecompact composite with the outflow module 200 are explained on the basisof FIGS. 7 and 8 to 13: The hydraulic outflow valve 18 is integratedinto the DC filter 5. The outflow pipe 202 is connected at its upper end242 by means of an insertion connection 60 and ring seals 22 to a lowerpart 4 of a DC filter 5 (FIG. 7). The lower part 4 of the DC filter 5 isterminated using an outlet connecting piece 7, which protrudes into theoutflow pipe 202. An upper part 6 of the DC filter 5 is connected to anupper part 84 of the pressurized water container 201 by means of athreaded connection and is terminated using a flushing water regulator 8and using control elements (not shown, also called regulators) of thehydraulic outflow valve 18, which are used for opening or closing thehydraulic outflow valve 18. The flushing water regulator 8 is connectedto the upper part 6 of the DC air filter 5 using a threaded connection.

A seat 12 of the hydraulic outflow valve 18 is also connected to thelower part 4 of the DC air filter 5 by means of a threaded connection.The valve seat 12 and a valve core 13 closing the valve seat in aleak-tight manner are located in a valve chamber 11 of the hydraulicoutflow valve 18. Horizontal outflow channels 9, which connect the watervolume in the interior of the pressurized water container 201 to a spaceabove the valve seat 12, are located in the middle part 21 of the DC airfilter 5. The middle part 21 of the DC air filter 5 has four verticalconnecting ribs 10, which connect the lower part 4 of the DC air filter5 to the upper part 6 of the DC air filter 5 and separate the outflowchannels 9 from one another. Four vertical ventilation channels 14extend above the upper part 6 of the DC air filter 5 along theconnecting ribs 10 into the lower part 4 of the DC air filter 5.

The implementation of the outflow module 200 in a toilet pressureflushing system having pressure wave flushing and low noise intensity isdescribed hereafter on the basis of FIGS. 4, 6, and 7. The outflowmodule 200 having the pressurized water container 201 with continuousflow, the outflow pipe 202, the DC air filter 5, and the hydraulicoutflow valve 18 is connected by installation to the carrier plate 501of the cistern mounting 500. In this case, the outflow pipe 202 isinserted via an opening on the base 80 of the pressurized watercontainer 501 into an outflow opening 504 of the cistern mounting 500and the pressurized water container 501 is implemented via connectingflanges 511 of the carrier plate 501 in the cistern mounting 500. Anoutflow part at the base 80 of the pressurized water container 201 hasconnecting surfaces 15, which are used for a connection to the cisternmounting 500. It can be inferred from the figures that the pressureflushing system 100 for toilet bowls having pressure wave flushing iscompleted by two hydraulic gas accumulators 19 having a predeterminedwater volume 420 and compressed air volume 400, which are also connectedto the cistern mounting 500 and via this to two water connections 8. Thewater inflow to the hydraulic gas accumulators 19 and the water outflowvia the outflow module 200 into the toilet bowl are effectuated via thecistern mounting 500. The position of the outflow module as a componentof an in-wall pressure flushing system having pressure wave flushingcomprising an in-wall supporting frame 90 in the wall behind the toiletbowl 300 can be seen from FIGS. 4 and 7. It is apparent that the loweredge of the outlet connecting piece 7 of the DC air filter 5 is locatedat a minimum safety height zh of 0.400 m above flow level 301 in thetoilet bowl 300.

The functionality and achieved effect of the outflow module 200, whichis implemented in a pressure flushing system 100 for toilet bowls usingpressure wave flushing, can be explained as follows according to theinvention: The water which is required for flushing enters the outflowmodule 200 from the hydraulic gas accumulators 19. For this purpose, thewater flows out of the hydraulic gas accumulators 19 via connectingchannels 510 into the cistern mounting 500 and via the outflow shell 502in the base region of the pressurized water container 501 into thepressurized water container 201 and continuously floods the pressurizedwater container 1. Upon opening of the hydraulic outflow valve 18, thewater from the pressurized water container 1 passes via horizontaloutflow channels 9 of the DC air filter 5 into the valve chamber 11 andthen via the valve seat 12 by means of the outlet connecting piece 7into the outflow pipe 202 and ends in the toilet bowl.

In the event of malfunctions (partial vacuum in the water supply lineand risk of backflow of wastewater via the flow level 301 of the toiletbowl 300 upon opening of the hydraulic outflow valve 18), atmosphericair is aspirated via the vertical ventilation channels 14 in the upperpart 6 of the DC air filter 5 and flows through the vertical ventilationchannels 14 along the connecting ribs 10 and also through the lower part4 of the DC air filter 5, wherein the aspirated air flows furtherthrough the gap between the outflow pipe 202 and the outlet connectingpiece 7. The aspirated air flows further through the outlet connectingpiece 7 upward in the direction of valve chamber 11 and through thehorizontal outflow channels 9 into the pressurized water container 1.The aspirated air then passes via channels 510, 507 in the cisternmounting 500 and the water connections 508 into the water supply line.Soiling of the drinking water due to backflow of dirty water can thus bereliably avoided.

A through-flow chamber 11, which connects the water container 1 to theoutlet pipe 2 and in which an outlet valve 18 for opening and closingthe through flow is arranged, is located in the middle part 12 of theDC-L 5. The outlet valve comprises a valve seat 12 and a valve closure13. The flow rate of the water which flows from the water container 1into the outflow pipe 2 can be regulated via the lifting height of thevalve closure 13. The lifting height is settable by means of theflushing water regulator 8, which is screwed from above into the upperpart 6 of the DC-L: The further the regulator is screwed in, the less isthe lifting height, and the less is the water quantity which can flowthrough the valve from the water container into the outlet pipe. Thethrough-flow chamber 11 in the middle part of the DC-L 5 is delimited inrelation to the water container 1 by vertical ribs 10, which connect theupper part 6 to the lower part 4 of the DC-L 5 and between whichhorizontal through-flow channels 9 enable the inflow of water from thewater container 1 into the through-flow chamber 11 via the valve seat 12and, with open valve 18, further into the outflow pipe 2. Regulatorparts of the hydraulic outlet valve 18, which effectuate its opening andclosing (not shown), can be designed in various ways and can be arrangedat various locations, as is readily known for a person skilled in theart from the prior art and can be implemented in conjunction with thehydraulic outlet valve 18 disclosed here. For example, they can bedesigned as mechanical or electromechanical according to the pressure,step, or hand lever principle with or without brake or time lock. Thewater container is permanently filled with water, up to the top, so thatthe through-flow chamber 11 is also permanently filled with water.

The functionality and mode of operation of the pressure flushing system100 will be explained once again on the basis of the cross-sectionalview of the pressure flushing system 100 of FIG. 5: When the pressureflushing system is first put into use, water firstly flows, for example,from the local water line system (arrow A)—in this example via bothwater connections 508 into the supply channels 507 of the flushingsystem 100. From there, it flows further via the supply-outflow opening506 in the inflow shell 505 of the cistern mounting 500 into the gasaccumulators 19 (arrows B). The water (arrows B) compresses the gas 400(usually air) located in the gas accumulators there until the water hasreached its maximum water level 420 and the water 420 in the gasaccumulators 19 and also the gas 400 above the water 420 are at the samepressure as prevails in the local water line (generally typically 3-6bar). Moreover, water flows simultaneously via the supply channels 507and further through the connecting channels 510 connected thereto(arrows C) and flows further through supply openings 509 in the outflowshell 502 of the cistern mounting 500 into the pressurized watercontainer 201 of the outflow module 200 (arrows D). The water flowsuntil the pressurized water container 201 is completely filled, whereinthe air contained in the pressurized water container can escape via theventilation channels 14 of the DC filter 5. Furthermore, the space abovethe valve seat 12 is also filled with water via the horizontal outflowchannels 9 in the DC filter until the water 420′ in the pressurizedwater container 201 is also under the pressure as prevails in the localwater line.

If the hydraulic outflow valve 18 is opened, the water which is requiredfor flushing passes from the pressurized water container 501 viahorizontal outflow channels 9 of the DC air filter 5, via the valvechamber 11, and via the valve seat 12 by means of the outlet connectingpiece 7 into the outflow pipe 202 and ends in the toilet bowl 300. Thesame water quantity flows in out of the hydraulic gas accumulators 19into the outflow module 200, wherein the compressed gas/the compressedair expands and transmits this pressure energy to the flushing water, sothat pressure wave flushing results. The water flowing in flows out ofthe hydraulic gas accumulators 19 via the connecting channels 510 intothe cistern mounting 500 and via the outflow shell 502 in the baseregion of the pressurized water container 501 into the pressurized watercontainer 201. The pressurized water container 1 remains permanentlyflooded due to the flowing in. Water flows simultaneously out of thelocal drinking water/pressurized water line via the water connections508 and the inflow channels 507 into the gas accumulators 19 of thepressurized water flushing system 100, and does so until water and gasor air in the gas accumulators and the water in the pressurized watercontainer again have the same pressure as the water in the localdrinking water/pressurized water line.

The pressure flushing system 100 for toilet bowls having a cisternmounting 500 and an outflow module 200, as illustrated above and whereinthe outflow module 200 comprises a vertically oriented pressurized watercontainer 501 and an outflow pipe 502, a hydraulic outflow valve 18, anda DC pipe interrupter 5, enable a pressure wave flushing having steepwater front, whereby flushing can be performed very efficiently usingsmall water quantities. The outflow pipe 502 is arranged vertically inthe pressurized water container 501 and protrudes at the base out of thepressurized water container 201 for a flow connection to the toiletbowl, whereby a low noise development is implemented during flushing.The outflow module 200 is held by the cistern mounting 500, which alsocarries a gas accumulator 19. The cistern mounting 500 is designed aswater-conducting and has a water connection 8 for the connection to adrinking water line or the like and connecting channels 507, 510, whichfluidically connect the pressurized water container 501 and the gasaccumulator 19. The pressurized water flushing is very compact and isalso suitable for retrofitting in existing facilities due to the cisternmounting 500, which is designed as water-conducting. The pressureflushing system 100 meets the norm EN 1717 due to the integrated DCfilter.

It is clear to a person skilled in the art that and the manner in whichthe described embodiments and/or the details described on the basis ofthe exemplary embodiments may be reasonably combined in the scope of theinvention defined by the patent claims. However, it is not possible forreasons of space to illustrate all possible and reasonable combinationsin detail in the figures and/or describe them.

INDUSTRIAL APPLICABILITY

The pressure flushing system 100 having pressure wave flushing and lownoise intensity comprising the pressure cistern 50 having the cisternmounting 500 and the outflow module 200, and also the outflow module 200according to the invention presented here per se and the cisternmounting 500 for cisterns for pressure flushing devices for toilet bowlsin conjunction with the outflow module 200 and the hydraulic gasaccumulators find use in applications of sanitary technology and inhygiene devices.

1. An outflow module (200) for cisterns for toilet pressure flushingdevices, characterized in that it comprises a vertically orientedpressurized water container (201), which is ideally continuously floodedwith water in the operating state and vertically arranged within thepressurized water container an outflow pipe (202), which extends withits lower part (240) beyond an opening (504) at the base of thepressurized water container (201), wherein an upper part of the outflowpipe (202) is connected to a lower part (4) of a DC air filter (5), theupper part (6) of which DC air filter is connected to an upper part (84)of the pressurized water container (201), and wherein the lower part (4)of the DC air filter (5) ends in an outlet connecting piece (7), whichdischarges into the outflow pipe (202), and the upper part (6) of the DCair filter (5) is terminated using a flushing water regulator (8) and/orusing control elements of a hydraulic outflow valve (18), wherein, inthe middle part (21) of the DC air filter (5), horizontal outflowchannels (9) are located, which are separated from one another byvertical connecting ribs (10) and which are connected to the interior ofthe pressurized water container (201), and a valve chamber (11) and avalve seat (12) of the hydraulic outflow valve (18) are located, whereina valve core (13) is located in the valve chamber (11) and whereinvertical ventilation channels (14) extend over the upper part (6) of theDC air filter (5), the connecting ribs (10), and over the lower part (4)of the DC air filter (5).
 2. The outflow module (200) according to claim1, characterized in that a drain part at the base (80) of thepressurized water container (201) has connecting surfaces (15), whichare used for a connection to a cistern mounting (500).
 3. The outflowmodule (200) according to claim 1, characterized in that an upper end(242) of the outflow pipe (202) is connected by means of an insertionconnection (60) and ring seals (22) to the lower part (4) of the DC airfilter (5).
 4. The outflow module (200) according to claim 1,characterized in that the valve seat (12) of the hydraulic outflow valve(18) is connected to the lower part (4) of the DC air filter (5) by athreaded connection.
 5. The outflow module (200) according to claim 1,characterized in that the flushing water regulator (8) is connected tothe upper part (6) of the DC air filter (5) by a threaded connection. 6.The outflow module (200) according to claim 1, characterized in that theupper part (6) of the DC air filter (5) is connected to the upper partof the pressurized water container (1) by a threaded connection.
 7. Acistern mounting (500) for toilet pressure flushing devices usingpressure wave flushing, characterized in that the cistern mounting (500)is a carrier plate (1) comprising an open outflow shell (502) accessiblefrom above for attaching an outflow module (200), which has an outflowopening (504) in the center of its base (503) for inserting an outflowpipe (202) and at least one inflow opening (509) on the peripheralsection of the base (503), wherein the carrier plate (1) furthermore hasat least one open inflow shell (505) accessible from above for attachinga hydraulic gas accumulator, and wherein an inlet/outlet opening (506)is located on the peripheral section of the base (503′) of the openinflow shell (505), which inlet/outlet opening is connected to an inflowchannel (507) or an inflow pipe of the cistern mounting (500), which hasa water connection (8), wherein the inlet and/or outlet opening (506) ofthe open inflow shell (505) is connected via a connecting channel (510)or a connecting pipe of the cistern mounting to the at least one inflowopening (509) on the peripheral section of the base (503) of the openoutflow shell (502).
 8. The cistern mounting (500) according to claim 7,characterized in that the open outflow shell (502) has attachmentflanges (511), which are used for attaching the outflow module (200). 9.The cistern mounting (500) according to claim 7, characterized in thatthe at least one open inflow shell (505) has attachment flanges (511′),which are used for attaching the hydraulic gas accumulator (19).
 10. Thecistern mounting (500) according to claim 7, characterized in that theoutflow opening (504) in the center of the base (503) of the outflowshell (502) has a seal (512), which is used for the pressure-tightinsertion of the outflow pipe (202).
 11. The cistern mounting (500)according to claim 7, characterized in that the carrier plate (501) hasthin walls and stabilizing ribs (513).
 12. The cistern mounting (500)according to claim 7, characterized in that the base (503, 503′) of theoutflow shell (502) and/or the inflow shell (505) protrude downward outof the carrier plate (501).
 13. The cistern mounting (500) according toclaim 7, characterized in that two accessible open inflow shells (505)are located on top on the carrier plate (501), which are used for therespective attachment of a hydraulic gas accumulator (19), wherein eachof the inflow shells (505) is connected to an inflow channel (7) or aninflow pipe having a water connection (508), wherein the inlet/outletopenings (506) of the open inflow shells (550) are each connected viaconnecting channels (510) or connecting pipes to an inflow opening (509)on the peripheral section of the base (503) of the open outflow shell(502).
 14. The cistern mounting (500) according to claim 7,characterized in that the carrier plate (501) is fixedly connected tothe outflow pipe (202).
 15. The cistern mounting (500) according to anyone of claims 7 to 14, characterized in that the carrier plate (501) hasinstallation retention elements.
 16. The cistern mounting (500)according to any one of claims 7 to 13, characterized in that thecarrier plate (501) is manufactured in one piece, preferably as aninjection-molded part or cast part.
 17. A pressurized water flushingsystem (100) for toilet bowls comprising a pressurized water container(201) and a mounting for the pressurized water container (201) and alsocomprising an outflow pipe (202) and a hydraulic outflow valve (18),which is used for the regulated drainage of flushing water out of thepressurized water container (201) via the outflow pipe (202) into thetoilet bowl (300), characterized in that the mounting is a cisternmounting (500) according to any one of claims 7 to 16 and pressurizedwater container (201), outflow pipe (202), and hydraulic outflow valve(18) are components of an outflow module (200) according to any one ofclaims 1 to 6, and it comprises at least one hydraulic gas accumulator(19), which is connected on the outflow side via the cistern mounting(500) to the pressurized water container (201) and is connectable on theinflow side via the cistern mounting (500) to a pressurized water supplysystem.